Open to opportunities

Gabriel Fernando Retamozo Vargas

@gabrielfernandoretam

Message

Construyo APIs y microservicios Java seguros y escalables para sistemas empresariales.

Peru

Message

What I'm looking for

Busco construir soluciones backend escalables, seguras y mantenibles con Java y Spring Boot, especialmente en entornos empresariales. Me interesa trabajar con microservicios, arquitecturas limpias, automatización, calidad de código y equipos donde pueda seguir impulsando formación técnica.

He desarrollado y mantenido sistemas backend críticos en CredicorpCapital y Kyndryl para entornos financieros, utilizando Java y Spring Boot. En Pulso Corporación Médica migré sistemas monolíticos a Arquitectura Hexagonal, mejoré los despliegues en 50% y reduje los tiempos de respuesta de APIs en 40%.

También formo a más de 100 estudiantes en Java, Spring Boot, microservicios, Docker, Jenkins y OAuth 2.0 en Código By Tecsup, alcanzando 85% de empleabilidad en roles backend. Me enfoco en arquitecturas limpias, APIs REST seguras, automatización de pruebas y soluciones mantenibles orientadas a la escalabilidad.

Experience

Work history, roles, and key accomplishments

Current

Java Instructor&Technical Trainer

Current

Codigo by Tecsup

Jan 2023 - Aug 2026 (3 years 7 months)

Designed and delivered a comprehensive Java curriculum, from programming fundamentals to enterprise microservices architecture, for 100+ students.
 Led hands-on training in Spring Boot 3, Spring Cloud, Docker, Jenkins, and OAuth 2.0 security.
 Developed real-world projects implementing Hexagonal Architecture with JUnit and Mockito testing.

Java Spring Framework Spring Boot Spring Cloud Spring MVC Spring Security Spring Data Spring AI Spring Boot Reactive Spring Native MySQL MongoDB PostgreSQL Postman .NET

Applications Development Analyst

CredicorpCapital

Dec 2025 - Jul 2026 (7 months)

Developed and maintained backend applications for critical financial systems, supporting the stock exchange and contributing to legacy infrastructure modernization. Managed ETL processes for financial data integration and performed testing, debugging, and technical documentation.

Java ETL Legacy Modernization Debugging Technical Documentation AI assisted Development

Backend Software Engineer

Kyndryl

Jan 2025 - Dec 2025 (11 months)

Designed and implemented backend services using Java and Spring Boot, applying Clean Architecture and CQRS to improve separation of concerns, scalability, and maintainability.
 Developed scalable and resilient backend services, applying software design best practices and patterns for enterprise systems.

Spring Boot Spring Cloud Spring MVC Spring Security Spring Data Spring AI Spring Boot Reactive Spring Native MySQL MongoDB PostgreSQL Postman

Backend Software Engineer

Pulso Corporacion Medica

Jan 2023 - Dec 2024 (1 year 11 months)

 Migrated monolithic systems to Hexagonal Architecture, improving deployment efficiency by 50%.
 Reduced API response times by 40% through database optimization and backend performance improvements.
 Implemented JWT-based authentication and API management, reducing security-related incidents by 95%.

Java Spring Framework Spring Boot Spring Cloud Spring MVC Spring Security Spring Data Spring AI Spring Boot Reactive Spring Native MySQL MongoDB PostgreSQL Postman .NET

Backend Developer Intern

ConsigueVentas

Jan 2022 - Jun 2022 (5 months)

 Developed 8+ RESTful APIs using Spring Boot, applying SOLID principles and
clean code practices.
 Implemented microservices that improved system availability by 30%.
 Containerized applications with Docker, reducing downtime by 60%.
 Participated in the migration of monolithic systems to microservices.